It's not a rumor, it's confirmed.
Retail-wide price drop:
http://biz.gamedaily.com/industry/feature/?id=16721
It wasn't clear at first if this ad was a special deal specific to the electronics retailer or if it's indeed a retail-wide price cut instituted by Sony Computer Entertainment America (SCEA). As it turns out, a merchandising manager (who wished to remain anonymous) at one of the world's biggest retailers has confirmed to GameDaily BIZ that the price drop is indeed retail-wide and it's scheduled to take place on July 12, although the first wave of ads to promote the PS3's new price won't kick in until Sunday, July 15.
The 12th is one day after the Sony E3 press conference.
They are going to announce a price cut at E3 as predicted by some and it will take effect the next day.
Thanks to Blacksaber for the sig!